Porting from Ipkiss 3.0.1 to Ipkiss 3.1¶
There are a small number of changes between IPKISS 3.0.1 (or early betas of 3.1) and the release of IPKISS 3.1 that can cause issues due to backward incompatibility.
Luceda debug environment variables have changed¶
The environment variable
IPKISS_LOG_LEVEL has been renamed to
LUCEDA_LOG_LEVEL. If you have been using this
variable (e.g. when prompted by Luceda support to assess a problem), you might need to rename this variable.
PICAZZO: The Transition between WireWaveguides has an adaptive length¶
In PICAZZO 3.0.1, the default length of a
WireWaveguideTransitionFromPort was fixed
TECH.WG.SHORT_STRAIGHT, irrespective of the widths of both waveguide templates. Because this could easily lead to
unphysically short tapers (e.g. between a 450nm wire and a 10um waveguide of a grating coupler), the length of the transition
now scales with the difference between the square of the core widths. The minimum transition length is still
This can affect your code where you have transitions between 2 PICAZZO
WireWaveguideTemplate instances with a large difference in core width.
PICAZZO: The default
ElectricalWireTemplate has changed¶
The PICAZZO component
ElectricalWireTemplate (not the IPKISS component
ElectricalWireTemplate) had a hardcoded
TECH.PURPOSE.DF.LINE. The component layout now has a parameter
purpose, with a default value
If your code used this component, the layer will have changed, or your design could export differently to GDSII.